Island



(No Model.)

' R. H. RICE.

. STOP MOTION FOR OOVERNORS.

NO. 536,156. Patented Mar..19, 1895.

\ lines in Fig. 1, the said ring ebeing provided y governor, the said sleeve being provided with RICHARD H. RICE, OF PROVIDENCE,

PATENT OFFICE.

RHODE ISLAND, ASSIGNOR TO THE RICE & SARGENT ENGINE COMPANY, OF SAME PLACE.

STOP-MOTION FOR GOVERNORS.

SPECIFICATION forming part of Letters Patent No. 536,156, dated March 19, 1895.

Application tiled January 4, 1895.

To all whom it may concern.-

Beit known that I, RICHARD H. RICE, a citizen of the United States, residing at Providence, inthe State of Rhode Island, have invented a new and useful Improvement in Stop-Motions for the Governors of Steam-Engines, of which the following is a specification.

The object of my invention is to provide positive means for automatically shutting 0H the steam from the engine, upon the occurrence of any accident which results in stopping the rotation of the governor, while the engine is continuing its action; and my invention consists in the employment of a reversely grooved cam in combination with a link movement, between the governor and the cut-0E valve gear, as hereinafter fully set forth.

In the accompanying drawings:-Figure 1, represents a side elevation of a steam engine governor provided with my improvement. Fig. 2, represents a detail side view taken at right angles to the view shown in Fig. 1. Fig. 3, represents a detail top view the governor being removed. f

In the drawings, A represents the v*fixed standard which serves to supportthe upright shaft, B, of the governor C, which shaft is driven by means of a pulley secured to the horizontal shaft D, from which connection is made with the upright shaft B by means ofa suitable bevel-gear and pinion. The head t' of the standard A is provided with the forked arm H, to which is pivoted the lever I, which lever is preferably made in two parts as indicated by the Vline a, in Fig. 3, 'the said parts being held together by meansof the bolts b and c. lThe two vparts of the lever ILv are made to inclose the sliding sleeve J of the the circumferential groove d, within which is placed the loose ring e,asindicated by dotted with perforations which are adapted to re-I ceive the studs f, f, extending inwardly from the opposite parts of the lever I, so that upon the rise and fall of the sleeve J, a correspondingmovement willbe imparted to the lever I.

The lever I is connectedat its short arm g, with the piston rod K, of the oil cylinder L,

which serves to steady the action of the gov- Serial No. 533,835. `(No model.)

ernor, the said rod being provided with the attached weight rest M; and to the end of the long arm 1. :rf. the lever, is connected the pendent weight'est M for effecting the proper adjustment of the action of the governor. To the side of the head 'L' of the standard A, is secured the plate G, the said plate being provided with the reversely directed camgroove R, the upper portion k. of which extends downwardly and outwardly from the` the side of the head of the standard A, is I placed the loose arm Q, which may be turned up as shown in Fig. 2, to form a bearing rest for the lever I in properly supporting the governor at the ordinary stopping and starting of the engine, but which when the engine is in operation, is to be turned downward to the position shown in Fig. 1 so as to provide for the resulting abnormal downward movement of the lever I, at the slipping or breaking of the driving-belt.

When the governor is operating under the normal conditions, the roller stud 'n in the cam-groove R'of the plate G, will be held in the inclined upper portion lo of said groove and in this case the valve-gear y will be operatedto close the valve, by the action ofthe cam-groove R upon the link Naud rod P, at the rise and fall of the governor through the limit of its normal variationLbut upon the loosening or breaking of the belt of the governor, so that the governor is caused to sink below the proper position for itsl lowest extreme of normal variation, then the stud n will be caused to enter the reversely inclined IOO movement of the governor, and this reverse action will serve to cause the closing of the valves of the engine, to shut oi the steam.

It is to be understood that the reversely in clined cam-groove R, may be arranged in a reverse position to that shown in Fig. 1, by making the proper connection with the valvegear of the engine to compensate for the resulting oppositely directed action .upon the link N and rod P, at the rise and fall of the governor.

I claim as my inventionl. In a stop motion for the governor of a steam engine, the combination of the governor, and a depending cam-link, operatively connected with the governor and the valvegear, with the reversely inclined cam adapted to change the transmitted action of the governor at its abnormal downward movement, substantially as described.

2. Ina stop motion for the governor of a steam engine, the combination of the governor, with the lever operatively connected with the sleeve of the governor, the reverseiy inclined cam, adapted to change the transmitted action of the governor at its abnormal downward movement, and the cam-linlt operatively connected with the lever andthe valve-gear, substantially as described.

RICHARD I-I. RICE.

Vitnesses:

SOCRATES SGHOLFIELD, JAMES W. BEAMAN. 

